The disc tool magazine is also a magazine that is often used in high speed CNC milling machines.
Disc tool magazine tool change process by the knife chopper, knife sets flip, tool changer and spindle and other action linkage to achieve. The entire tool change process by the CNC system control PLC. The disc magazine tool change is a random tool change, that is, after each tool change, the tool number and tool holder number is not necessarily the same. During the tool change, the robot can simultaneously grasp the knife from the magazine and the spindle, the knife and the knife, the tooling efficiency is high.
The disc magazine consists of cutter head motor, rotary cutter, indexing mechanism, knife cover and inverting mechanism. The cutter head motor drives the rotary cutter through the indexing mechanism. The cutter cover is fixed on the rotary cutter by the bracket, Rotate with the cutter head.
1. Select knife
When the T command is executed, the system first determines whether the tool is in the magazine. If not, the system will issue a T code error alarm. In addition, but also to determine whether the selected tool on the spindle, if already on the spindle, then complete the tool change control. And then determine the specific position of the selected tool in the magazine, if the selected tool is in the current tool change position, the turntable motor does not act, waiting for the robot to exchange the tool. If the selected tool is not in the tool change position, the system determines the shortest path and the number of steps of the current position of the selected tool to the tool change position. The output control signal causes the turntable motor to turn forward or reverse, the count switch on the turntable moves once. When the selected tool to the tool change position, the turntable motor brake stopped to complete the T code of the knife control.
2. Knife sets flip
Since the tool axis in the magazine is perpendicular to the tool axis in the milling machine tool spindle, the tool holder is turned 90° downward before the tool change so that the tool axis in the tool holder is parallel to the axis of the spindle. After the tool change, turn the tool cover upside down 90° .
When the tool set of the selected tool is turned to the tool change position, the roller in the rear of the tool holder enters the fork, the front chamber of the cylinder is fed, the piston is moved up and the fork is driven to turn the tool cover 90° , knife cover down flip detection switch signal. When the cylinder is in the back chamber, the piston moves down and drives the fork to turn the tool cover up 90° , and the tool set reset detection signal is signaled.
The above is the composition of the CNC milling machine disc tool magazine and the process of change tool introduction.